Casualty Loss Deduction for Rental Property — How Landlords File

TL;DR: Casualty losses on rental property are generally deductible without the disaster-declaration hurdle that applies to personal-use property. The deduction is the lesser of your adjusted basis or the decrease in fair market value, minus any insurance reimbursement. Report it on Form 4684 and keep photos, repair estimates, and claim records in case the IRS asks.

_Last reviewed: July 2026 · 6 min read_

A fire, flood, or vandalism hits one of your rental units and you're staring at $15,000 in damage. You file an insurance claim and start repairs, but the insurance payout doesn't cover everything. What happens to the gap on your tax return? The casualty loss deduction for rental property follows different — and usually simpler — rules than the ones homeowners face when personal-use property is damaged.

Okoniq Property Hub keeps a photo log of your property's condition before and after maintenance. That timestamped record can be the proof you need if you have to reconstruct a casualty loss claim months later.

What makes a rental casualty loss different from a personal one?

Rental property is held for business or investment, so losses are treated as business losses under IRC §165(c)(1) or (2), not personal losses under §165(c)(3). The practical difference: you don't need a federally declared disaster to deduct a loss on a rental. A tree falls on the roof, a tenant floods the kitchen, a vandal smashes windows — all of those are deductible events if they're sudden, unexpected, and unusual.

Personal-use casualty losses were repealed by the TCJA through 2025, then made permanent by the One Big Beautiful Bill (P.L. 119-21) — but only for federally declared disasters. Beginning in 2026, the scope expands to include state-declared disasters as well. Rental property never had that restriction. If the event meets the IRS definition of a casualty — sudden, unexpected, and not the result of gradual deterioration — you can claim it whether the President signs a declaration or not.

Insurance reimbursements reduce your deductible loss dollar-for-dollar. If you receive $12,000 and the damage cost $15,000, your casualty loss is $3,000 before any basis or FMV limitation. If you expect a reimbursement but haven't received it yet, you cannot deduct the shortfall until you know the insurance company won't pay. The IRS wants you to report the loss in the year you realized it, which means the year the reimbursement becomes fixed and determinable. For detailed rules on timing rental income and expenses, see how to track rental property expenses for taxes.

How do I calculate the deduction amount?

The deduction is the lesser of your adjusted basis in the property or the decrease in fair market value immediately before and immediately after the casualty. Adjusted basis means your original cost plus capital improvements, minus prior depreciation. If you bought the property for $200,000, added a $30,000 addition, and took $40,000 in depreciation, your adjusted basis is $190,000. If the casualty reduces the property's FMV from $280,000 to $265,000 (a $15,000 drop), your deductible loss is $15,000 — the lesser of $190,000 and $15,000.

You need a credible estimate of the decrease in FMV. The IRS accepts contractor repair estimates, appraisals before and after, or a combination. Photographs timestamped before and after the event help substantiate the claim. A vague guess does not. If you're claiming a $25,000 loss and the only evidence is "the house looked bad," the IRS will disallow it. If you're unsure how improvements and depreciation affect your basis, read depreciation recapture at sale for a walkthrough of how basis moves over time.

Land is never depreciable and does not suffer a casualty loss unless it's physically damaged in a way that reduces its value (e.g. sinkholes, contamination). A fire that destroys the building does not let you claim a loss on the land underneath. Separate the land basis from the building basis before you calculate anything.

What form do I use and where does it go on my return?

Report the loss on Form 4684, Casualties and Thefts. Section A is for personal-use property (which you're not using here), and Section B is for business and income-producing property. Fill out Section B, then carry the result to Schedule E (Part I, line 20, "Other expenses") with the label "Casualty loss — see attached Form 4684." If you file multiple Schedules E because you own multiple rentals, allocate the loss to the correct property.

Form 4684 asks for the FMV before and after, your adjusted basis, insurance reimbursement, and the deductible loss. If the event created a gain instead of a loss — for example, insurance overpaid and you pocketed more than the damage — you report the gain as income. That's rare for small landlords, but it happens when an old unit gets rebuilt with a payout that exceeds what you had in it.

Passive loss rules still apply. If your rental activity is passive (most landlords are passive unless they qualify for real estate professional status), the casualty loss goes into the same passive loss bucket as your other Schedule E losses. You may get the $25,000 passive loss allowance if your modified AGI is under the phase-out range — see the $25,000 passive loss allowance for landlords for how that works. If the loss exceeds your allowance, it carries forward under the normal rental loss carryforward rules.

What documentation does the IRS expect?

The IRS wants proof that the casualty happened and proof that your loss calculation is supportable. Keep these items in your records:

• Photos or video of the property immediately before and after the event, if available. A dated photo archive showing the condition of the roof before the storm is more persuasive than a contractor's opinion after the fact.
• Contractor repair estimates or invoices. The IRS uses these to verify the decrease in FMV. If you repaired the damage yourself or had a tenant fix it, document the cost of materials and the fair market value of the labor.
• Insurance claim correspondence. Save the claim filing, the adjuster's report, the settlement letter, and any denials or partial payments. If the insurance company disputes coverage, the denial letter proves you won't be reimbursed.
• Appraisals or comparable sales data if the property's value dropped but you chose not to repair. A fire-damaged duplex that you sell as-is needs an appraisal or broker's opinion of value to support the FMV decrease.
• Police or fire department reports if vandalism, theft, or arson was involved. The IRS may ask for a report number if the loss is large.

A casualty loss audit is document-intensive. The IRS presumes you're inflating the loss unless you can show otherwise. If you can't produce a before-and-after FMV estimate, the deduction gets disallowed. That's why landlords who log property condition regularly — photos of HVAC installs, roof inspections, pre-tenant walkthroughs — have an easier time reconstructing a loss claim.

What if the loss exceeds my income and I can't use it all this year?

Casualty losses that exceed your current-year income carry forward indefinitely as part of your suspended passive losses. If you have $30,000 in rental income, $40,000 in routine expenses, and a $20,000 casualty loss, you show a $30,000 loss on Schedule E. The passive loss rules limit how much of that you can deduct against other income, but the unused portion doesn't disappear — it carries forward to future years until you have enough passive income to absorb it, or until you dispose of the property in a fully taxable transaction.

If you're a real estate professional under IRC §469(c)(7), your rental losses aren't passive and you can deduct the full casualty loss against ordinary income subject to at-risk and basis rules. Most landlords don't qualify for that status unless they materially participate more than 750 hours per year and spend more than half their working time in real property trades or businesses.

FAQ

Does a casualty loss reduce my basis in the property?

Yes. The deductible loss reduces your adjusted basis, which means you'll have a higher gain (or smaller loss) when you eventually sell. If your basis was $150,000 and you deducted a $10,000 casualty loss, your new basis is $140,000. That $10,000 effectively gets recaptured as capital gain on sale.

Can I deduct a casualty loss if I never filed an insurance claim?

You can, but the IRS scrutinizes these claims closely. If the damage was covered by insurance and you chose not to file, the IRS may argue you haven't realized a loss because reimbursement was available. If the damage was below your deductible or excluded from coverage, document that fact with a copy of your policy and a letter from the insurer stating no claim was filed or that the event wasn't covered.

What if I repair the property and the cost exceeds the decrease in FMV?

The deduction is still limited to the decrease in FMV or your adjusted basis, whichever is less. If the fair market value dropped $8,000 but you spent $12,000 on repairs, your casualty loss is $8,000 (minus insurance). The extra $4,000 may be a capital improvement that increases basis, depending on whether the repair restored the property to its prior condition or improved it. See HVAC repair vs improvement for how the IRS draws that line.

Do I report casualty losses separately for each rental property?

Form 4684 lets you aggregate multiple casualties in Section B, but you should identify each property by address on an attached statement and allocate the loss to the correct Schedule E if you file more than one. If you own four rentals and only one had a casualty, the loss goes on that property's Schedule E line 20.

Can I use a casualty loss carryforward to offset a 1031 exchange gain in a future year?

No. When you dispose of a property in a like-kind exchange under IRC §1031, the transaction is nontaxable (or partially taxable if you receive boot), so suspended passive losses from that property are not triggered. Losses only become deductible when the property is disposed of in a fully taxable transaction. Read 1031 exchange basics for how that deferral mechanism works.

<div class="glass rounded-2xl p-5 mt-7 max-w-4xl border border-red-400/30 bg-red-500/5"> <div class="flex items-start gap-3"> <span class="text-2xl flex-shrink-0">⚠️</span> <div class="flex-1 min-w-0"> <p class="text-red-200 text-sm font-bold">Not tax advice</p> <p class="text-slate-300 text-xs mt-1 leading-relaxed"> This post assumes single-member LLC or Schedule E filers and does not account for partnerships, trusts, or changes in disaster-loss rules enacted after July 2026. Tax rules change and depend on your specific situation. Talk to a licensed CPA before acting on anything here, and confirm current figures on IRS.gov. </p> </div> </div> </div>